Apparatus for forming concrete floors



Oct. 3, 1933. w 005 1,929,287

APPARATUS FOR FORMING CONCRETE FLOORS Filed Jan. 2, 1950 2 Sheets-Sheet l I 4 INVENTOB 5 J -{9121" M12003 mull! his ATTORNEY Oct. 3, 1933. H. w. R005 APPARATUS FOR FORMING CONCRETE FLOORS Filed Jan. 2, 1930 2 Sheets-Sheet 2 INVENTOR gen 1 371113008 7211s ATTORNEY 20 rows of floor forms.

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Patented Oct. 3, 1 933 APPARATUS ron FORMING CONCRETE A FLooRs Henry Roos, Cincinnati, Ohio ,App lication January 2, 1930. Serial No. 417,854

1 Claim. (01. -1315) This invention relates to apparatus for forming concrete floors, and particularly to apparatus-of this kind in which, ajplurality of rectangular forms are assembled in regular rows on temporary supports r shores to form afloor mold. When forms of uniform shape and sizeare assembled in this manner to form a floor mold it frequently happens that a space remains at the side of the floor, or if the forms are assembled from opposite sides or ends toward the middle, the space occurs between adjacent rows which is narrower than thelength or breadth of the form, and'it is the object of this invention toprovide simple and inexpensive means for filling in or bridging this space. i V

Another object of the invention is to provide a fioor form of this kind which is inexpensive to make and light in weight, and which is adjustable or collapsible in one direction, so that it may be made to fit the narrow space between adjacent More specifically, the object of the invention is to construct a floor form of this kind in two parts, one of which is slidable over the other, means being provided for securing the parts to each other in any position of adjustment.

To these and other ends, the invention consists in the construction and arrangement of parts that will appear from the following description when read in conjunction with the accompanying drawings, the novel features being pointed out in the claim following the specification.

In the drawings:

Figure 1' is a fragmentary plan View of a floor mold illustrating one application of the invention;

Figure 2 is an enlarged inverted plan View of a floor form constructed according to one embodiment of the invention;

Figure 3 is a vertical section of the same taken substantially on line 33 of Figure 2 and looking in the direction of the arrows at said line;

Figure 4 is an enlarged section taken substantially on line 4-4 of Figure 3 and looking in the direction of the arrows at said line;

Figure 5 Ba view similar to Figure 4, but showing parts in other positions;

Figure 6 is a fragmentary perspective view of the bottom thereof, and

Figure 7 is a fragmentary view of one corner of I a form showing a modified form of construction.

Referring more particularly to the drawings, Figure 1 shows a fioor mold formedby assembling floor forms 1 of uniform shape and size on temporary supports or shores 2. The shores 2 have square, or rectangular top surfaces closely engaged 'by'the forms which are cutaway at the corners to fit around the shores and have angular shaped brackets 3 at the corners adapted to engage brackets provided therefor on the shores.

" The forms andshores describedabove are" of PATENT OFFICE-*1 usualconstruction; When assembling the'forms.

1 on shores, they are assembled in regular rows extending in twodirections parallel with the side of v the floor in one directio n and parallel with the end 'of the floor in anotherdirection. When assembling-a floor inIthis manner, it seldomhappens that a'given number of rows of ,tlie'u'niform forms exactly fills the span across'the fioor'in either direction, v but usually a space narrower than the length or width of the uniform form re- To this end, an adjustable form 4 is provided,

mains in one or both directions and which may be which is adapted to be adjusted to the width of the narrow space in the floor mold. When fully extended, the form 4 may beof substantially the same shape and size as the forms 1, and adapted to be assembled therewith to form the floor mold.

In the embodiment illustrated,the form 4 is constructed of sheet material and comprises two parts 5 and 6, one of which, as the part 5, being an upper adapted to slide over the other or lower part.

Each of these parts is reinforced at its outer edge with a downwardly projecting flange 7 secured thereto by. any suitable means, preferably by welding.

Secured to the under side of the part 6 and arranged substantially perpendicular to the flanges 7 or its outer edge, and parallel to its side edges,

area plurality of bars 8. Three of these bars are shown in the drawings, although it will be understood that a greater or lesser number may be em ployed. Thebars 8 serve as reinforcing members and may be'secured to the part 6 by any suitable these brackets are arranged near the outer ends of the bars 8 to which they are secured.

Bars 10 similar to the bars 8 are also provided on the part 5, and arealso reinforcedby means of brackets 11 similar to the brackets 9 in all respects except that they are located on opposite sides of the bars, as shown in Figure 2. The inner end of the part 5 overlaps and slides over the inner end of the part which is arranged between 5 tions.

I It will be noted that 'a form is thus provided the part 5 and the bars 10 which are therefore secured to the part 5 at and adjacent their outer ends only, the inner ends being spaced from the part 5 to provide a clearance: so that the part 6 can move between them.

The bars 8 and 10 are arranged in substantial alinement with each other and overlap or lie in contact with each other at their inner ends, the overlapping portions being provided with openings 13 adapted to register with each other for the reception of bolts 12, whereby they may be secured to each other. The ends-of the form may be connected by means of unitary bars 14 bolted to the corner brackets 3 of the forms, as shown in Figures 2 and 6, and cooperate with the bars 8 and 10 to secure the partsin adjusted position. I

In this construction, bars of different lengths would be provided to fit forms adjusted to different widths. However, a form so constructed is rigid and theliability of the parts slipping rela tively to each other is'eliminated. The-bars li', however, could be made in two parts 16 and 17, corresponding to the parts 8 and 10 of-thereinforcing bars and connected to each other in the same manner, as seen inFigure 7. r

7 It will be noted that by detaching the strips 14 and removing the bolts 12, the parts 5 and 6 may be moved toward or from each other. The openings 13 are elongated to form slots leaving narrow orshort spaces between adjacent slots,-so that some parts of the slots in one bar register with "slotsin the other so that the bolts can be inserted therethrough on all positions of adjustment,and serve to retain the parts in their adjusted posiwhich can be quickly adjusted to the width of the narrow space and assembled in the floor mold with the forms 1 to form a fioor mold, thus eliminating the necessity of providing a large number of forms of difierent widths for filling in the space. It sometimes happens that a space is formed between adjacent rows of iorms which is narrower than the width otthe adjustable form when the. latter is adjusted to its narrowest limit. Such a space is readily covered by means of a strip of sheet material supported on the edges of the adjacent forms 1. By arranging the brackets 9 and 11 near the outer edges of the parts 5 and 6, and on opposite sides of the bars 8 and 10, they do not interfere with the movement of the parts 5 and-6 relative to each other.

While the invention has been described with reference to certain details of construction, it

adapted to engage said bars for securing them to each other and retaining the parts in adjusted position, and a pair of bars each connecting a corner bracket on one of said parts with a corner bracket on the other of said parts and cooperating with said first mentioned means for securing said parts in adjusted position. r s

' -HENRY W. R008.

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